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Separation method of acetophenone from 1-phenethyl alcohol

A separation method and acetophenone technology, applied in chemical instruments and methods, separation/purification of hydroxyl compounds, separation/purification of carbonyl compounds, etc., can solve the problem of unsuitability for industrial scale production, long operation period and low product purity and other problems, to achieve the effect of high product recovery rate, less three wastes and stable chemical properties

Active Publication Date: 2017-06-20
JIANGXI KEYUAN BIOPHARM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN102627544A proposes a method for separating acetophenone and 1-phenylethanol by utilizing the different inclusion abilities of cyclodextrin. Although this method has mild separation conditions, good separation effect, and reusable separation medium, etc. Advantages, but the operation period is long (usually more than 12 hours), the purity of the separated product is low in most cases, and the operation is complicated, so it is not suitable for industrial scale production

Method used

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  • Separation method of acetophenone from 1-phenethyl alcohol

Examples

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Effect test

Embodiment 1

[0024] A kind of separation method of acetophenone and 1-phenylethanol, such as figure 1 shown, including the following steps:

[0025] (1) the mass percent concentration of extractant glycerol and acetophenone is that 34% acetophenone and 1-phenylethanol mixture are mixed in molar ratio 1:1 and put into the rectification in the first rectifying tower 2, Tower top obtains the mixture of acetophenone and 1-phenylethanol that the mass percent concentration of acetophenone is 56%, obtains 1-phenylethanol and glycerol mixture at the bottom of the tower, and the first rectifying tower 2 operating pressure is 0.1MPa, The temperature at the top of the tower and at the bottom of the tower is the boiling point of the system;

[0026] (2) the mixture of acetophenone and 1-phenylethanol that step (1) the first rectifying tower 2 tower tops obtains is squeezed into the bottom of extraction tower 1, with the fresh extraction agent glycerin that adds from the top of extraction tower 1 Cou...

Embodiment 2

[0029] A kind of separation method of acetophenone and 1-phenylethanol, such as figure 1 shown, including the following steps:

[0030] (1) the mass percent concentration of extracting agent glycerol and acetophenone is 3% acetophenone and 1-phenylethanol mixture in molar ratio 0.6:1 mixes and puts into the rectification in the first rectification tower 2, Tower top obtains the mixture of acetophenone and 1-phenylethanol that the mass percent concentration of acetophenone is 43%, obtains 1-phenylethanol and glycerol mixture at the bottom of the tower, and the first rectifying tower 2 operating pressure is 0.001MPa, The temperature at the top of the tower and at the bottom of the tower is the boiling point of the system;

[0031] (2) the mixture of acetophenone and 1-phenylethanol that step (1) the first rectifying tower 2 tower tops obtains is squeezed into the bottom of extraction tower 1, with the fresh extraction agent glycerin that adds from the top of extraction tower 1 ...

Embodiment 3

[0034] A kind of separation method of acetophenone and 1-phenylethanol, such as figure 1 shown, including the following steps:

[0035] (1) the mass percent concentration of extractant glycerin and acetophenone is 95% acetophenone and 1-phenylethanol mixture in molar ratio 10:1 and mixes and enters rectification in the first rectifying tower 2, Tower top obtains the mixture of acetophenone and 1-phenylethanol that the mass percentage concentration of acetophenone is 96.8%, obtains 1-phenylethanol and glycerol mixture at the bottom of the tower, and the first rectifying tower 2 operating pressure is 0.01MPa, The temperature at the top of the tower and at the bottom of the tower is the boiling point of the system;

[0036](2) the mixture of acetophenone and 1-phenylethanol that step (1) the first rectifying tower 2 tower tops obtains is squeezed into the bottom of extraction tower 1, with the fresh extraction agent glycerin that adds from the top of extraction tower 1 Counterc...

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Abstract

The invention discloses a separation method of acetophenone from 1-phenethyl alcohol. The solubility and the relative volatility of acetophenone and 1-phenethyl alcohol in glycerine are different, so that separation of acetophenone from 1-phenethyl alcohol is realized via coupling operation of extraction and rectification. The separation method is simple; separation effect is excellent; energy is saved; the separation method is friendly to the environment, and is suitable for industrial-scale continuous operation.

Description

[0001] This application is a divisional application of the invention patent application with application number 201510713615.3. technical field [0002] The invention belongs to the field of fine chemicals, and in particular relates to a method for separating acetophenone and 1-phenylethanol. Background technique [0003] Acetophenone is an important organic chemical raw material. It has the smell of hawthorn. It can be used as a solvent, spice, plasticizer and chemical intermediate and is widely used in soap, cigarettes, spices, medicine, resin, etc., with a melting point of 19.6°C. The boiling point is 202°C and the density is 1.027. 1-Phenylethyl alcohol is also an important organic chemical raw material. It has a soft, pleasant and long-lasting rose aroma. Among various food flavors and tobacco flavors, the melting point is 20°C, the boiling point is 203.6°C, and the density is 1.013. [0004] The industrial production methods of acetophenone include cumene oxidation by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/78C07C45/83C07C49/213C07C29/74C07C29/84C07C33/22
CPCC07C29/74C07C29/76C07C29/84C07C45/78C07C45/83C07C49/78C07C33/22C07C49/213
Inventor 王勤波熊振华陈楚雄
Owner JIANGXI KEYUAN BIOPHARM
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